hmm am i over thinking?

So i've been dating this guy for a while and everything was going amazing but he started pulling away from me because he got scared that we were moving too fast and we'd end up like his last relationship. I completely understand and let him know how i feel about him and that i would still be there and haven't pushed at all. We still hang out once a week at least and our connection and relationship hasn't changed like we still really get along and have our quirky, cute relatio ship. As soon as i'm gone though he changes and gets all like short over text and emotionless. What gets me is that he no longer likes my photos on insta yet likes other girls photos and my friends photos. He also has completely stopped opening my snapchats or sending me anything and he used to call me all the time and no longer does that. Like what is that? It gets to me so much idk what to think. Like i feel like he's no longer interested but i just dk if i'm overthinking.